Title : Nicotine acts directly on pituitary GH3 cells to inhibit prolactin promoter activity.

Pub. Date : 1995 Oct

PMID : 8563721






12 Functional Relationships(s)
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1 Nicotine acts directly on pituitary GH3 cells to inhibit prolactin promoter activity. Nicotine prolactin Rattus norvegicus
2 We have employed the GH3 rat pituitary cell line to investigate whether nicotine can regulate prolactin (PRL) gene expression. Nicotine prolactin Rattus norvegicus
3 We have employed the GH3 rat pituitary cell line to investigate whether nicotine can regulate prolactin (PRL) gene expression. Nicotine prolactin Rattus norvegicus
4 Nicotine strongly inhibited (45%) transient expression of a construct containing the first 187 base-pairs of the rat PRL promoter cloned upstream of the chloramphenicol acetyl transferase (CAT) gene. Nicotine prolactin Rattus norvegicus
5 This implies that nicotine acts directly on the GH3 cells to inhibit transcription directed by the PRL promoter. Nicotine prolactin Rattus norvegicus
6 Nicotine was also observed to yield a concentration-dependent inhibition of the stimulation by thyrotrophin-releasing hormone (TRH) of PRL promoter activity, implying that nicotine can also interfere with hormonal regulation of the PRL gene. Nicotine prolactin Rattus norvegicus
7 Nicotine was also observed to yield a concentration-dependent inhibition of the stimulation by thyrotrophin-releasing hormone (TRH) of PRL promoter activity, implying that nicotine can also interfere with hormonal regulation of the PRL gene. Nicotine prolactin Rattus norvegicus
8 Nicotine was also observed to yield a concentration-dependent inhibition of the stimulation by thyrotrophin-releasing hormone (TRH) of PRL promoter activity, implying that nicotine can also interfere with hormonal regulation of the PRL gene. Nicotine prolactin Rattus norvegicus
9 Nicotine was also observed to yield a concentration-dependent inhibition of the stimulation by thyrotrophin-releasing hormone (TRH) of PRL promoter activity, implying that nicotine can also interfere with hormonal regulation of the PRL gene. Nicotine prolactin Rattus norvegicus
10 These results suggest that the reduced serum PRL levels that result from smoking may originate in part from decreased transcription of the PRL gene resulting from a direct effect of nicotine on pituitary PRL-secreting cells. Nicotine prolactin Rattus norvegicus
11 These results suggest that the reduced serum PRL levels that result from smoking may originate in part from decreased transcription of the PRL gene resulting from a direct effect of nicotine on pituitary PRL-secreting cells. Nicotine prolactin Rattus norvegicus
12 These results suggest that the reduced serum PRL levels that result from smoking may originate in part from decreased transcription of the PRL gene resulting from a direct effect of nicotine on pituitary PRL-secreting cells. Nicotine prolactin Rattus norvegicus